How Gwyneth Paltrow Sculpts Sexy Arms at 39

Gwyneth Paltrow was all arms at the 2012 Grammy Awards in Los Angeles on Feb. 12. Looking even more defined than we remember her, the 39-year-old's sleeveless Stella McCartney gown showed off her shapely shoulders and strong arms. Paltrow is no stranger to working hard to look good: she and celeb trainer Tracy Anderson put a lot of time toward her fitness regimen. See some of the arm exercises they do together to achieve such award-worthy arms below, then click here for even more!

A lot of Gwyneth's arm work includes resistance training without weights like this arm series that Tracy developed for her. The movements are very fluid and generally involve a lot of repetitions. Here's an example that Tracy shared withSelf: